MC74F242 Overview
QUAD BUS TRANCEIVERS WITH 3-STATE OUTPUTS The MC54/74F242 and MC54/74F243 are Quad Bus Transmitters/Receivers designed for 4-line asynchronous 2-way data munication between data buses. For conditions shown as MIN or MAX, use the appropriate value specified under remended operating conditions for the applicable device type. Not more than one output should be shorted at a time, nor for more than 1 second.